. -- newtown. we will be showing the memorial service in its entirety at 12:30 eastern. ♪ >> this week pulitzer prize- winning author anne applebaum discusses her new boat -- book, "iron curtain: the crushing of eastern europe, 1944-1956." >> why do you open with a quote from churchill? >> heat. the expression -- he coined the expression iron curtain. it was such an evocative description of what happened when he gave the speech that i thought it was important to put that the beginning of the book. >> did you ever think of what he called that the iron curtain? >> there is a long story. it is a theatrical term. there was an iron curtain theaters used to use to prevent fires. churchill used it first in private. >> you know why? >> it was a favor for truman. that is where truman was from. >> let's get a slice of that speech. >> an iron curtain has descended across the continent. behind that line, like all the capitals of the ancient states of central and eastern europe -- baltimore, berlin, prague, v